[Gadsden1st]

I have an old Mossberg bolt action 410 with no external mag but it holds 3. I believe a 410 slug is like a 45 slug. I would be happy to hear it that is true from any gun experts out there. I know I wouldn’t want to face my shotgun.

[stevio]

410 & 45 are the same caliber. I don’t know about your Mossberg but some guns can interchange the round. I.e. The Judge by Taurus.

[gorush]

Close...but the slug is necessarily smaller by twice the thickness of the shell casing. .410 is also a smaller dia. than .45. My Taurus Public Defender shoots both.

[The KG9 Kid]

Read here:

The Box O’ Truth #41 – The Taurus Judge Vs. The Box O’ Truth

I wouldn't want to be shot with so much as a BB gun, but a 410 slug isn't the same as a .41/.45LC from a handgun (e.g. Taurus Judge, etc.) and won't exceed the FPS as shown on the cartridge box out of a standard-length shotgun barrel.

I'm unsure what the utility is for a .410 shotgun firing slugs. I do understand that .410s are more suitable than larger-bore gauges for hunting sage grouse and quail when using bird shot.

I have no idea what use the newer .410/.45LC chambered pistols have except for being handy versus venomous snakes, where they certainly perform better than a traditional .45/.44 pistol loaded with snakeshot rounds.

Testing is showing neither of these seem to be well-suitable for defense, unless you have no other firearm.